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- Additive manufacturing (2)
- Thermoplastic (2)
- Activated carbon (1)
- Bridge inspection (1)
- Carbon nanofibers (1)
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- Composite (1)
- Composite beams (1)
- Damage detection (1)
- Dielectric heating (1)
- Extrusion (1)
- FRP composites (1)
- Fatigue testing (1)
- Finite element analysis (1)
- Flight time (1)
- Fluvial estuaries (1)
- Gyroid (1)
- Homogenization (1)
- Hydrocarbons (1)
- Magnetite (1)
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- Remote sensing (1)
- River tides (1)
- Shear connectors (1)
- Simulation (1)
- Soil remediation (1)
- Thermal (1)
- Thermal expansion (1)
- Thermo-mechanical characterization (1)
- Thermoforming (1)
- Tide-surge-river interaction (1)
Articles 1 - 7 of 7
Full-Text Articles in Civil and Environmental Engineering
Integration Of Material Characterization, Thermoforming Simulation, And As-Formed Structural Analysis For Thermoplastic Composites, Philip M. Bean, Roberto A. Lopez-Anido, Senthil Vel
Integration Of Material Characterization, Thermoforming Simulation, And As-Formed Structural Analysis For Thermoplastic Composites, Philip M. Bean, Roberto A. Lopez-Anido, Senthil Vel
Civil Engineering Faculty Scholarship
An improved simulation-based thermoforming design process based on the integration of material characterization and as-formed structural analysis is proposed. The tendency of thermoplastic composites to wrinkle during forming has made simulation critical to optimized manufacturing, but the material models required are complex and time consuming to create. A suite of experimental methods has been developed for measurement of several required properties of the molten thermoplastic composite. These methods have the potential to enhance thermoplastic composites manufacturing by simplifying and expediting the process. These material properties have been verified by application to thermomechanical forming predictions using commercial simulation software. The forming …
Development And Experimental Assessment Of Friction-Type Shear Connectors For Frp Bridge Girders With Composite Concrete Decks, William G. Davids, Dante Guzzi, Andrew Philip Schanck
Development And Experimental Assessment Of Friction-Type Shear Connectors For Frp Bridge Girders With Composite Concrete Decks, William G. Davids, Dante Guzzi, Andrew Philip Schanck
Civil Engineering Faculty Scholarship
This paper details the development and experimental assessment of a friction-type connector, designed to transfer shear flow between the top flange of a fiber-reinforced polymer (FRP) tub girder and a composite concrete deck for bridge applications. In contrast with previously used bearing-type connectors, this system relies on a deformed FRP surface to transfer shear via direct interlock with the concrete deck. The connector is materially efficient, simple to fabricate, can be used with lower-grade structural or stainless-steel fasteners, and provides a high degree of interface stiffness. Six compression-shear specimens were tested to assess the connector fatigue resistance and ultimate connection …
Effects Of Fiber Orientation On The Coefficient Of Thermal Expansion Of Fiber-Filled Polymer Systems In Large Format Polymer Extrusion-Based Additive Manufacturing, José Luis Colón Quintana, Lucinda Slattery, Jon Pinkham, Joanna Keaton, Roberto A. Lopez-Anido, Keith Sharp
Effects Of Fiber Orientation On The Coefficient Of Thermal Expansion Of Fiber-Filled Polymer Systems In Large Format Polymer Extrusion-Based Additive Manufacturing, José Luis Colón Quintana, Lucinda Slattery, Jon Pinkham, Joanna Keaton, Roberto A. Lopez-Anido, Keith Sharp
Civil Engineering Faculty Scholarship
Large format polymer extrusion-based additive manufacturing has been studied recently due to its capacity for high throughput, customizable bead size and geometry, and ability to manufacture large parts. Samples from three fiber-filled amorphous thermoplastic materials 3D printed using a Masterprint 3X machine from Ingersoll Machine Tools were studied, along with their neat counterparts. Characterization techniques included thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), and thermo-mechanical analysis (TMA). TGA results showed that the fillers decreased the degradation temperature for most of the materials investigated, with a 30°C decrease for polycarbonate (PC) and a 12°C decrease for polyethylene terephthalate glycol (PETG). For …
Impact Of Uav Hardware Options On Bridge Inspection Mission Capabilities, Zahra Ameli, Yugandhar Aremanda, Wilhelm A. Friess, Eric N. Landis
Impact Of Uav Hardware Options On Bridge Inspection Mission Capabilities, Zahra Ameli, Yugandhar Aremanda, Wilhelm A. Friess, Eric N. Landis
Civil Engineering Faculty Scholarship
Uncrewed Aerial Vehicles (UAV) constitute a rapidly evolving technology field that is becoming more accessible and capable of supplementing, expanding, and even replacing some traditionally manual bridge inspections. Given the classification of the bridge inspection types as initial, routine, in-depth, damage, special, and fracture critical members, specific UAV mission requirements can be developed, and their suitability for UAV application examined. Results of a review of 23 applications of UAVs in bridge inspections indicate that mission sensor and payload needs dictate the UAV configuration and size, resulting in quadcopter configurations being most suitable for visual camera inspections (43% of visual inspections …
Numerical Modeling And Experimental Investigation Of Effective Elastic Properties Of The 3d Printed Gyroid Infill, Philip Bean, Roberto A. Lopez-Anido, Senthil Vel
Numerical Modeling And Experimental Investigation Of Effective Elastic Properties Of The 3d Printed Gyroid Infill, Philip Bean, Roberto A. Lopez-Anido, Senthil Vel
Civil Engineering Faculty Scholarship
A numerical homogenization approach is presented for the effective elastic moduli of 3D printed cellular infills. A representative volume element of the infill geometry is discretized using either shell or solid elements and analyzed using the finite element method. The elastic moduli of the bulk cellular material are obtained through longitudinal and shear deformations of a representative volume element under periodic boundary conditions. The method is used to analyze the elastic behavior of gyroid infills for varying infill densities. The approach is validated by comparing the Young’s modulus and Poisson’s ratio with those obtained from compression experiments. Results indicate that …
Repeatable Use Assessment Of Silicon Carbide As Permanent Susceptor Bed In Ex Situ Microwave Remediation Of Petroleum-Impacted Soils, Ritchie Lafaille, Yigit C. Bozkurt, Emmy Pruitt, Janelle Lewis, Rene Bernier, Deyuan Kong, Paul Westerhoff, Paul Dahlen, Onur G. Apul
Repeatable Use Assessment Of Silicon Carbide As Permanent Susceptor Bed In Ex Situ Microwave Remediation Of Petroleum-Impacted Soils, Ritchie Lafaille, Yigit C. Bozkurt, Emmy Pruitt, Janelle Lewis, Rene Bernier, Deyuan Kong, Paul Westerhoff, Paul Dahlen, Onur G. Apul
Civil Engineering Faculty Scholarship
Efficiency of microwave-enabled ex situ soil remediation can be improved by dielectric susceptors. Cost, and environmental burden of these susceptors can be minimized if they are used repeatedly in a permanent bed set-up. In this study, carbon nanofibers, activated carbon, magnetite, and silicon carbide were tested at the lab scale for repeated use in permanent microwave-induced thermal soil remediation. Despite their superior ability to convert microwaves into heat, carbon nanofibers experienced electrokinesis and activated carbon partially combusted in the microwave cavity, which complicates their pragmatic use in remediation applications. Magnetite was also able to convert microwaves into heat effectively and …
Coastal Windstorms Create Unsteady, Unpredictable Storm Surges In A Fluvial Maine Estuary, Preston Spicer, Pascal Matte, Kimberly Huguenard, Laura N. Rickard
Coastal Windstorms Create Unsteady, Unpredictable Storm Surges In A Fluvial Maine Estuary, Preston Spicer, Pascal Matte, Kimberly Huguenard, Laura N. Rickard
Civil Engineering Faculty Scholarship
Storm surges create coastal flooding that can be damaging to life and property. In estuaries with significant river influence (fluvial), it is possible for tides, storm surge, and river discharge to interact and enhance surges relative to the immediate coast. These tide-surge-river interactions were previously identified in a fluvial Maine estuary as higher frequency (>four cycles per day) oscillations to storm surge which were proposed to be incited by enhanced friction and resonance during certain windstorm events (Spicer et al. 2019). The relative contributions to tide-surge-river interaction from atmospheric forcing variables (wind, barometric pressure, and externally generated surge) remains …